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`is a top View of the same.

rUNITED STATES PATENT OFFICE.

JOHN E. ANDERSON, OF' NEW YORK, N. Y.

THROTTLE-VALVE- ARRANGEMENT.

Specification of Letters Patent No. 10,083, dated October 4, 1853.

To al wiz-0m t may concern Be it known that I, JOHN E. ANDERSON, of thecity, county, and State of New York, have invented certain new anduseful Improvements in Balance Throttle or Regulator Valves forSteam-Engines and other Engines of a Similar Nature; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, making partof this specification, in which- Figure 1, is a section of the box, orpart of the steam-pipe, which contains the valves, showing the valves asin operation. Fig. 2,

Fig. 3, is an outside View of the same, showing the valve spindle, andthe lever through which the governor acts upon the valves.

Similar letters of reference indicate corresponding parts, in theseveral figures.

The nature of this invention consists in the employment, as a throttleor regulator, n connection with a governor, of two cylindrical valves,constructed, arranged, and operating, in such a manner, as hereinafterdescribed, that they will at all times balance each other perfectly, andthat their effect upon the engine will be varied by an eX- tremelyslight movement.

The object of the invention is, to produce a valve which will work withvery little friction, which will wear correctly for a long time, andwhich will be very sensitive to the slightest changes in the operationof the governor.

The valves, A, A, are in the form of hol low cylinders, closed at oneend, and open at the other; they are of equal size, and are placed sideby side in two open cylinders, B, B, in which they are fitted to workeasily; the said cylinders being placed longitudinally in thesteam-pipe, and the space all around them closed up. The valves areconnected by links, C, C, to opposite ends of a short lever, D, whosefulcrum is a spindle, E, which passes transversely through thesteam-pipe, and carries, outside the said steam-pipe, the lever, F,which connects with the governor. The lever, D, is firmly secured to thespindle, E. The connections of the valves are at equal distances fromthe fulcrum, so that both must have the same motion. Through the sidesof each valve, are made any suitable number of passages, a, a, (see Fig.1,) which are in the form of narrow slots, extending around any portionof the valve; a similar number of slots of similar width being made inthe cylinders, B, B, in which the valves are fitted. The slots are soarranged that all those in the valve will be opposite those in thecylinder at the same time; and when such is the case, there is a freecommunication through the steam-pipe. The area of the opening iscontracted, by moving the valve in either direction from this position;and the communication is closed altogether, by bringing the slots in thevalve opposite the spaces between the slots in the cylinder. The slotsin the two cylinders and valves are severally so arranged that bothvalves would be wide open, or quite closed, at the same time; and thatboth would present the same area of opening at all times. The governoroper ates upon the lever, F, in a similar manner to that in which itacts upon the lever of any other valve; and the movement of the saidlever varies the openings of the valves, 0r closes them entirely. Byconnecting the governor at a proper distance from the fulcrum, E, orvalve-spindle, a proper movement may be given to the valves, to producethe required variation in the openings.

The simplest way of constructing the valve-seat is to cast thecylinders, B, B,

with a short length of pipe, which will constitute a valve-box. The onlyfitting-up required will then be the boring of the cylinders, and theturning of the valves to fit them. The slots may be made so narrow thatthey would close and open to their full width with the smallest desiredamount of motion. On account of the small amount of motion that isnecessary, the wear of the valves will be very slight. If slots, a, a,

are made on opposite sides of the valves and cylinders, they will beperfectly balanced in all directions; one balancing the other, and thesteam acting equally on all sides of each: thus the friction on everypart of the wearing surfaces will be the same; and the movement beingthe same, the wear will be equal.

W'hat I claim as my invention, and desire lndrcal valve seats, B, B; theseveral Openl0 to secure by Letters-Patent, is, ings being arranged nthe manner as sub- The combination, to serve the purpose of stantallyset forth. a throttle valve 01' regulator, of tWo hollow JOHN E ANDERSON5 cylindrical valves, A, A, connected with a lever, D, on opposite sidesof its ulcrum, 'Vtnesses: and having slotted openings, a, a, corre- S.H. WALES, spending With similar openings in the cy S. F. COHEN.

